Comments on: Building a Google Wave Gadget with GWT

By: WaveConnector for GWT: Local Testing and Turnkey Gadget Development « The Zukunft

Wed, 10 Feb 2010 23:32:27 +0000

[...] again Alex Moffat over at Lombardi who first gave me the idea of creating Wave Gadgets in [...]

By: A Wave Gadget + Robot using GWT 2.0 and Google App Engine, Part 1 « The Zukunft

Mon, 08 Feb 2010 18:54:23 +0000

[...] http://development.lombardi.com/?p=809 [...]

By: RG

RG — Mon, 01 Feb 2010 16:26:30 +0000

Hi, it seems to be working with GWT 1.5 only, but not GWT 2.0
any ideas?

By: Alexey Akhunov

Alexey Akhunov — Wed, 06 Jan 2010 12:47:45 +0000

It seems that currently the only way for a gadget to communicate to the backend is via robot. A robot can access the Gadget’s shared state (via Gadget.getField and Gadget.setField method). Gadget can hook a callback on the state modification and Robot can react on DOCUMENT_CHANGED event (and some others) to see if the gadget’s state changed. It could be cumbersome, but this is sort of RPC…

By: Alex Moffat

Alex Moffat — Thu, 06 Aug 2009 14:45:15 +0000

I’ve not heard of anything yet. I think the wave team will be adding a proxy in the future to make this work.

By: ozzi

ozzi — Wed, 05 Aug 2009 09:20:28 +0000

Hi,

I am also facing the same problem and I can’t use GWT’s RPC in my wave gadget. Did someone find a solution for that?

Cheers.

By: Alex Moffat

Alex Moffat — Tue, 21 Jul 2009 18:21:18 +0000

Sorry, I’ve not used GWT RPC in a gadget. You’re probably the expert at this I think, as you say in the issue you submitted, that the proxy is not properly configured. I’m afraid I’d be reduced to using cross site scripting techniques in this case. At some point the wave developers must (I hope) provide a proxy to let you do this.

By: Johannes Feulner

Johannes Feulner — Mon, 20 Jul 2009 20:33:41 +0000

Dear Alex,
I am currently trying hard to cast my weblily.net music score writer project into a wave gadget.

weblily.net is written with GWT using GWT’s RPC. However, it doesn’t work out. Calls from the gadget container’s proxy for the RPC requests do not get through to my server.

Do you have any experience with wave+gadget+GWT+RPC? In a wave conversation Melissa directed me to your blog. If anyone does know it, you should be the one.

Best regards,

Johannes
PS: I tried to get the gadetRCP sample running, but that one doesn’t work either http://gwt.google.com/samples/GadgetRPC-1.0.2/com.google.gwt.gadgets.sample.gadgetrpc.client.GadgetRPC.gadget.xml

By: Alex Moffat

Alex Moffat — Wed, 17 Jun 2009 13:49:26 +0000

Yep, everyone gets a normal and a test account. My gadget development has paused for a while because the server where I host the gadget javascript has failed. Hopefully it will be repaired soon. What I want to try next is gadget to robot communication. I know this is possible but there is little info on how to actually do it.

By: David

David — Wed, 17 Jun 2009 07:36:13 +0000

Very interesting. I didn’t know Google was allowing you to have multiple accounts. If you find you need any help testing your gadgets, feel free to let me know!